Delta-Sigma ADC. ADS131E08 Datasheet

ADS131E08 Datasheet PDF, Equivalent


Part Number

ADS131E08

Description

Delta-Sigma ADC

Manufacture

etcTI

Total Page 30 Pages
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ADS131E08 Datasheet
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ADS131E04, ADS131E06, ADS131E08
SBAS561C – JUNE 2012 – REVISED JANUARY 2017
ADS131E0x 4-, 6-, and 8-Channel, 24-Bit, Simultaneously-Sampling, Delta-Sigma ADC
1 Features
1 Eight Differential ADC Inputs
• Outstanding Performance:
– Dynamic Range: 118 dB at 1 kSPS
– Crosstalk: –110 dB
– THD: –90 dB at 50 Hz and 60 Hz
• Analog Supply Range Options:
– 3 V to 5 V (Unipolar)
– ±2.5 V (Bipolar, Allows DC-Coupling)
• Digital: 1.8 V to 3.6 V
• Low Power: 2 mW per Channel
• Data Rates: 1, 2, 4, 8, 16, 32, and 64 kSPS
• Programmable Gains: 1, 2, 4, 8, and 12
• Fault Detection and Device Testing Capability
• SPI™ Data Interface and Four GPIOs
• Package: TQFP-64 (PAG)
• Operating Temperature Range:
–40°C to +105°C
2 Applications
• Power Protection: Circuit Breakers, and Relay
Protection
• Energy Metering: Single Phase, Polyphase, and
Power Quality
• Battery Test Systems
• Test and Measurement
• Simultaneous Sampling Data Acquisition Systems
3 Description
The ADS131E0x are a family of multichannel,
simultaneous sampling, 24-bit, delta-sigma (ΔΣ),
analog-to-digital converters (ADCs) with a built-in
programmable gain amplifier (PGA), internal
reference, and an onboard oscillator. The ADC wide
dynamic range, scalable data rates, and internal fault
detect monitors make the ADS131E0x attractive in
industrial power monitoring and protection as well as
test and measurement applications. True high-
impedance inputs enable the ADS131E0x to directly
interface with a resistor-divider network or a voltage
transformer to measure line voltage, or a current
transformer or Rogowski coil to measure line current.
With high integration levels and exceptional
performance, the ADS131E0x family enables the
creation of scalable industrial power systems at
significantly reduced size, power, and low overall
cost.
The ADS131E0x have a flexible input multiplexer per
channel that can be independently connected to the
internally-generated signals for test, temperature, and
fault detection. Fault detection can be implemented
internal to the device, using the integrated
comparators with digital-to-analog converter (DAC)-
controlled trigger levels. The ADS131E0x can operate
at data rates as high as 64 kSPS.
These complete analog front-end (AFE) solutions are
packaged in a TQFP-64 package and are specified
over the industrial temperature range of –40°C to
+105°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
ADS131E0x
TQFP (64)
10.00 mm × 10.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
ADS131E08 Simplified Schematic
Line A
Line B
Line C
Line N
Current
Sensing
Voltage
Sensing
Channel 1 PGA
Channel 2 PGA
Current
Sensing
Channel 3 PGA
Voltage
Sensing
Current
Sensing
EMI
Filters
and
Input
MUX
Channel 4 PGA
Channel 5 PGA
Voltage
Sensing
Channel 6 PGA
Current
Sensing
Voltage
Sensing
Channel 7 PGA
Channel 8 PGA
û
ADC
û
ADC
û
ADC
û
ADC
û
ADC
û
ADC
û
ADC
û
ADC
Device
Voltage
Reference
Oscillator
Control
and
SPI Interface
Fault
Detection
Test
Op
Amp
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

ADS131E08 Datasheet
ADS131E04, ADS131E06, ADS131E08
SBAS561C – JUNE 2012 – REVISED JANUARY 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison ............................................... 4
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 7
7.1 Absolute Maximum Ratings ...................................... 7
7.2 ESD Ratings.............................................................. 7
7.3 Recommended Operating Conditions....................... 7
7.4 Thermal Information .................................................. 8
7.5 Electrical Characteristics........................................... 9
7.6 Timing Requirements .............................................. 12
7.7 Switching Characteristics ........................................ 12
7.8 Typical Characteristics ............................................ 13
8 Parameter Measurement Information ................ 16
8.1 Noise Measurements .............................................. 16
9 Detailed Description ............................................ 17
9.1 Overview ................................................................. 17
9.2 Functional Block Diagram ....................................... 18
9.3 Feature Description ................................................ 19
9.4 Device Functional Modes........................................ 28
9.5 Programming........................................................... 33
9.6 Register Map........................................................... 39
10 Application and Implementation........................ 49
10.1 Application Information.......................................... 49
10.2 Typical Application ................................................ 58
11 Power Supply Recommendations ..................... 61
11.1 Power-Up Timing .................................................. 61
11.2 Recommended External Capacitor Values ........... 62
11.3 Device Connections for Unipolar Power Supplies 62
11.4 Device Connections for Bipolar Power Supplies .. 63
12 Layout................................................................... 64
12.1 Layout Guidelines ................................................. 64
12.2 Layout Example .................................................... 64
13 Device and Documentation Support ................. 66
13.1 Device Support...................................................... 66
13.2 Related Links ........................................................ 66
13.3 Receiving Notification of Documentation Updates 66
13.4 Community Resource............................................ 66
13.5 Trademarks ........................................................... 66
13.6 Electrostatic Discharge Caution ............................ 66
13.7 Glossary ................................................................ 66
14 Mechanical, Packaging, and Orderable
Information ........................................................... 67
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (December 2013) to Revision C
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
• Changed formatting of Thermal Information table note ......................................................................................................... 8
Changes from Revision A (April 2013) to Revision B
Page
• Deleted device graphic ........................................................................................................................................................... 1
• Changed ADS131E0x family description to 24-bits only throughout document..................................................................... 1
• Added AVSS to DGND row to Absolute Maximum Ratings table .......................................................................................... 7
• Changed minimum specification to External Reference, VREFP parameter in Electrical Characteristics table.................... 7
• Changed conditions in Figure 10.......................................................................................................................................... 13
• Changed conditions in Figure 11.......................................................................................................................................... 13
• Changed START Opcode to START in Figure 39................................................................................................................ 28
• Changed Reset (RESET) section for clarity ......................................................................................................................... 29
• Changed Power-Up Sequencing section.............................................................................................................................. 61
Changes from Original (June 2012) to Revision A
Page
• Deleted AGND to DGND row from Absolute Maximum Ratings table ................................................................................... 7
• Changed value of Digital input to DVDD row in Absolute Maximum Ratings table................................................................ 7
• Added minimum and maximum specifications to External Reference, Reference input voltage parameter in Electrical
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Copyright © 2012–2017, Texas Instruments Incorporated
Product Folder Links: ADS131E04 ADS131E06 ADS131E08


Features Datasheet pdf Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity ADS131E04, ADS131E06, ADS131E08 SBAS561C – JUNE 2012 – REVISED JAN UARY 2017 ADS131E0x 4-, 6-, and 8-Chann el, 24-Bit, Simultaneously-Sampling, De lta-Sigma ADC 1 Features •1 Eight Di fferential ADC Inputs • Outstanding P erformance: – Dynamic Range: 118 dB a t 1 kSPS – Crosstalk: –110 dB – T HD: –90 dB at 50 Hz and 60 Hz • Ana log Supply Range Options: – 3 V to 5 V (Unipolar) – ±2.5 V (Bipolar, Allo ws DC-Coupling) • Digital: 1.8 V to 3 .6 V • Low Power: 2 mW per Channel Data Rates: 1, 2, 4, 8, 16, 32, and 6 4 kSPS • Programmable Gains: 1, 2, 4, 8, and 12 • Fault Detection and Devi ce Testing Capability • SPI™ Data I nterface and Four GPIOs • Package: TQ FP-64 (PAG) • Operating Temperature R ange: –40°C to +105°C 2 Application s • Power Protection: Circuit Breaker s, and Relay Protection • Energy Mete ring: Single Phase, Polyphase, and Power Quality • Battery Test Systems • Test and Measurement • Simultaneous Samp.
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